From the Richmond Sentinel, 5/5/1864, p. 2, c. 2

Yankee Prisoners. – The number of Yankees now held
as prisoners in the Confederate States, exclusive, we believe, of those taken at
Plymouth, is 12,268. Of these, 1,943 are at the Libby, in this city, 9,616 in
the State of Georgia, and 1,019 at Danville, Va.